Some cells,such as epithelia, proliferate more rapidly when the body is asleep than when it is awake.

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问题 Some cells,such as epithelia, proliferate more rapidly when the body is asleep than when it is awake.

选项 A、cluster
B、multiply
C、convert
D、subsist

答案B

解析 这句话的意思是:有些细胞比如上皮细胞,在人睡着的时候比清醒时——得更快。在给出的选项中,cluster“聚合,成串”;multiply“繁殖,增加”;convert“转换,改变”;subsist“生存,供养”。根据前面的意思,本处填入B选项较为合适。因此正确答案是B。
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